'The ISA has been referred to as "a fork of MIPS64r6" due to a perceived lack of changes judging from instruction listings.^[30][31] In August 2021, Linux maintainers complained that submitted LoongArch code is "...a blind copy of the MIPS code...", however "only with a different name".^[32]'

https://en.wikipedia.org/wiki/Loongson

So, is LoongArch truly independently developed by Loongson Technology? Are the Loongson processors manufactured by some foundery in China?